Question

which sentence from the section “vaccines are made from weak or dead germs” best introduces booster shots to the reader? a some vaccines are made from a weakened form of a disease - causing germ. b this creates immunity against future infections with the same type of germ. c in these cases, the immune system needs a reminder. d each new vaccine deals with the latest versions of these ever - changing viruses.

Explanation:

A booster shot is given to remind the immune - system. Option C mentions that the immune system needs a reminder, which is most related to the concept of a booster shot. Options A and B talk about how vaccines are made and their basic function in creating immunity. Option D focuses on new vaccines dealing with virus versions.

Answer:

C. In these cases, the immune system needs a reminder.